travis: first cut at travis configuration

tests end-to-end build of dqsegdb and dependencies, then runs `--help` for all installed binaries as a first cut at some tests

.gitignore

@@ -16,3 +16,4 @@ web/src/.pydevproject
 *.pyc
 *.so
 *.swp
+/.coverage

requirements.txt

+pykerberos
+python-cjson
+m2crypto
+pyRXP
+http://software.ligo.org/lscsoft/source/glue-1.50.0.tar.gz